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/*
* memchunk.c
*
* BeeCrypt memory block handling, code
*
* Copyright (c) 2001 Virtual Unlimited B.V.
*
* Author: Bob Deblier <bob@virtualunlimited.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "system.h"
#include "memchunk.h"
#include "debug.h"
/*@-compdef@*/ /* tmp->data is undefined */
memchunk* memchunkAlloc(size_t size)
{
memchunk* tmp = (memchunk*) calloc(1, sizeof(*tmp));
if (tmp)
{
tmp->size = size;
/*@-mustfree@*/ /* tmp->data is OK */
tmp->data = (byte*) malloc(size);
/*@=mustfree@*/
if (tmp->data == (byte*) 0)
{
free(tmp);
tmp = 0;
}
}
return tmp;
}
/*@=compdef@*/
void memchunkFree(memchunk* m)
{
if (m)
{
if (m->data)
{
free(m->data);
m->size = 0;
m->data = (byte*) 0;
}
free(m);
}
}
memchunk* memchunkResize(memchunk* m, size_t size)
{
/*@-branchstate@*/
if (m)
{
if (m->data)
m->data = (byte*) realloc(m->data, size);
else
m->data = (byte*) malloc(size);
if (m->data == (byte*) 0)
{
free(m);
m = (memchunk*) 0;
}
else
/*@-nullderef@*/
m->size = size;
/*@=nullderef@*/
}
/*@=branchstate@*/
/*@-nullret -compdef @*/ /* LCL: m->data might be NULL */
return m;
/*@=nullret =compdef@*/
}
memchunk* memchunkClone(const memchunk* m)
{
if (m)
{
memchunk* tmp = memchunkAlloc(m->size);
if (tmp)
memcpy(tmp->data, m->data, m->size);
return tmp;
}
return (memchunk*) 0;
}
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